title: Real-time calibration of laser absorption spectrometer using spectral correlation performed with an in-line gas cell.
abstract: A real-time drift correction and calibration method using spectral correlation based on a revolving in-line gas cell for laser-based spectroscopic trace-gas measurements has been developed and evaluated experimentally. This technique is relatively simple to implement in laser spectroscopy systems and assures long-term stability of trace-gas measurements by minimizing the effects of external sources of drift in real-time. Spectroscopic sensitivity sufficient for environmental monitoring and effective drift suppression has been achieved for long-term measurements of CO₂ with a quantum cascade laser based spectrometer.
authors.forename: Clinton J
authors.initials: CJ
authors.lastname: Smith
authors.forename: Wen
authors.initials: W
authors.lastname: Wang
authors.forename: Gerard
authors.initials: G
authors.lastname: Wysocki